I'm into upgrading a stock stereo to a nice sounding one but I don't go overboard with it. I don't spend enough time in my truck to really enjoy it.
Here was my set up:
http://www.toyota-4runner.org/audio-...em-02-sr5.html
I would like to upgrade the sub and front speakers at some point still. The sub I have, while very practical and sturdy doesn't pack quite the punch I had hoped.